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首页> 美国卫生研究院文献>Membranes >Exploring the Effect of Iron Metal-Organic Framework Particles in Polylactic Acid Membranes for the Azeotropic Separation of Organic/Organic Mixtures by Pervaporation
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Exploring the Effect of Iron Metal-Organic Framework Particles in Polylactic Acid Membranes for the Azeotropic Separation of Organic/Organic Mixtures by Pervaporation

机译：探讨铁金属 - 有机骨架颗粒在聚乳酸膜中的效果通过渗透蒸发分离有机/有机混合物的共沸分离

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A microporous carboxylate metal-organic framework MIL-100 Fe was prepared as submicron particles by microwave-assisted hydrothermal synthesis (Fe-MOF-MW). This product was explored, for the first time, for the preparation of polylactic acid (PLA) mixed matrix membranes. The produced MOF was characterised by powder X-ray diffraction (PXRD), environmental scanning electron microscopy (ESEM) as well as by thermogravimetric analysis (TGA) and nitrogen adsorption/desorption. The effect of different Fe-MOF-MW concentrations (0.1 and 0.5 wt%) on the membrane properties and performance were evaluated. These membranes were used in the pervaporation process for the separation of methanol/methyl tert-butyl-ether mixtures at the azeotropic point. The influence of the feed temperature and vacuum pressure on the membrane performance was evaluated and the results were compared with PLA pristine membranes. Moreover, the produced membranes have been characterised in terms of morphology, MOF dispersion in the polymeric membrane matrix, wettability, thickness, mechanical resistance and swelling propensity. The presence of Fe-MOF-MW was found to have a beneficial effect in improving the selectivity of mixed matrix membranes towards methanol at both concentrations. The highest selectivity was obtained for the PLA membranes embedded with 0.5 wt% of Fe-MOF-MW and tested at the temperature of 25 °C and vacuum pressure of 0.09 mbar.
机译：通过微波辅助水热合成（Fe-Mof-Mw）制备微孔羧酸盐金属 - 有机框架MIL-100 Fe作为亚微米颗粒。本产品首次探讨，用于制备聚乳酸（PLA）混合基质膜。所生产的MOF的特征在于粉末X射线衍射（PXRD），环境扫描电子显微镜（ESEM）以及热重分析（TGA）和氮吸附/解吸。评价不同Fe-Mof-MW浓度（0.1和0.5wt％）对膜性能和性能的影响。这些膜用于在共沸点处分离甲醇/甲基叔丁基 - 醚混合物的渗透蒸发方法。评估进料温度和真空压力对膜性能的影响，并将结果与​​PLA原始膜进行比较。此外，所生产的膜已经表征在聚合物膜基质中的形态，MOF分散体，润湿性，厚度，机械性和膨胀倾斜。发现Fe-MOF-MW的存在在改善两种浓度下对甲醇的混合基质膜的选择性具有有益的效果。获得嵌入0.5wt％Fe-Mof-Mw的PLA膜的最高选择性，并在25℃的温度下测试，真空压力为0.09毫巴。

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